Patent NZ-735923-A (NZ)
Title: Method of pumping aqueous fluid containing surface modifying treatment agent into a well
Inventor: BHADURI SUMIT
IPC: C09K8/584
Filed: 2016-03-10
Abstract: The present invention relates to a method of treating a siliceous or metal (M) oxide-containing subterranean formation penetrated by a well. The method comprises (a) preparing an aqueous treatment fluid comprising: (i) a surface modifying treatment agent having an anchor and a hydrophobic tail; and (ii) an aqueous media comprising an organic acid; (b) pumping the aqueous treatment fluid into a well penetrating the subterranean formation; and (c) binding the surface modifying treatment agent to a surface of the subterranean formation by attaching the anchor to the formation; wherein the organic acid is selected from the group consisting of acetic acid, formic acid, citric acid and mixtures thereof, wherein either (a) the anchor is a metal and the hydrophobic tail is an organo-silicon material, a fluorinated hydrocarbon or both an organo-silicon material and a fluorinated hydrocarbon; or (b) the anchor is an organophosphorus acid derivative and the hydrophobic group is attached thereto. The invention also relates to a method of treating a siliceous or metal (M) oxide-containing subterranean formation penetrated by a well. The method comprises (a) pumping into the well an aqueous treatment fluid comprising a surface modifying treatment agent and an aqueous media comprising an organic acid wherein the surface modifying treatment agent comprises an anchor and a hydrophobic tail; (b) binding the surface modifying treatment agent to a surface of the subterranean formation by attaching the anchor to the formation; and (c) aligning the surface modifying treatment agent to the siliceous or metal oxide-containing subterranean formation such that the hydrophobic tail is directed away from the surface of the formation; wherein the organic acid is selected from the group consisting of: acetic acid, formic acid, citric acid and mixtures thereof; wherein either (a) the anchor is a metal and the hydrophobic tail is an organo-silicon material, a fluorinated hydrocarbon or both an organo-silicon material and a fluorinated hydrocarbon; or (b) the anchor is an organophosphorus acid derivative and the hydrophobic group is attached thereto. The invention also relates to a method of treating a siliceous or metal (M) oxide-containing subterranean formation penetrated by a well. The method comprises (a)pumping into a well penetrating the subterranean formation an aqueous fluid comprising a surface modifying treatment agent having an anchor and a hydrophobic tail and an organic acid, wherein: (i) the anchor is a metal and the hydrophobic tail is an organo-silicon material, a fluorinated hydrocarbon or both an organo-silicon material and a fluorinated hydrocarbon; or (ii) the anchor is an organophosphorus acid derivative and the hydrophobic group is attached thereto; and wherein: (iii) the organic acid is selected from the group consisting of acetic acid, formic acid, citric acid, and mixtures thereof; and (iv) the amount of organic acid in the aqueous fluid is between from about 0.5 to about 25 volume percent.